Heat-alarm



(No Model.)

ANTHONY ISKE & ALBERT ISKE.

HEAT ALARM.

No. 434,872. Patented Aug. 19, 1890.

THE NORRIS FETERS co vwnm-Llrno, vusmucmu, n. c,

'UNiTED STATES PATENT @rricn.

ANTHONY ISKE AND ALBERT ISIIE, OF LANCASTER, PENNSYLVANIA.

H EAT-ALARM.

SPECIFICATION forming part of Letters Patent No. 434,872, dated August19, 1890. Application filed March 22, 1890. fierial Note-1,945. (NomodelJ To all whom it may concern.-

Be it known that we, ANTHONY ISKE and ALBERT IsKE, citizens of theUnited States, residing at Lancaster, in the county of LancasterandState of Pennsylvania, have invented certain new and uscfullmprovementsin Fire Alarms and Heat-Indicators and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention is an improvement on the fire-alarm and heat-indicatorwhich forms the subject-matter of Letters Patent No. 287,439, granted toAnthony Iske and Albert Iske, October30, 1883. In said patent a pair ofbulbs connected by a tube inclose a volatile liquid in oaeuo, theconnection being such that when heat affects the lower bulb thevaporization and expansion of a part of the liquid in said bulb willforce the remainder of said liquid up through the connecting-tube intothe upper bulb, which then descends and operates or releases the alarm.

The general principle of the present invention is the same; but it hasfor its object to increase the sensibility of the mechanism to theaction of heat, to provide for adj ustment, and to secure greatersimplicity. These ends are attained by the construction and combinationof devices hereinafter particularly set forth and shown. l

In the accompanying drawings, Figure 1 represents a side elevation ofthe bulbs and the devices operated thereby, the front of theinclosing-casing being partly broken away. Fig. 2 represents a verticalsection through the same from front to rear. Fig.3 represents anexternal side elevation of the same, with connection running to amechanical alarm, and also electric wires for closing or opening circuitthrough any ordinary electrical alarm and Fig 4 represents the bulbs andtube having a weight attached thereto instead of the retaining-spring.

A designates the upperbulb, and B the lower bulb, of our volatile-liquidheat-indicator. These are connected by a tube 0, which descends at a sofar into said lower bulb B that the expansion of the vapor will forcethe liquid up through said tube into said upper bulb, which will thendescend by gravity.

Heretoforc we have pivoted the bulbs on a shaft crossing the tube 0midway between them. To secure greater leverage for the weight of theupper bulb, we now extend the pivot-shaft D transversely through theeasing from front to back on the line of the center of the lower bulb.These bulbs, though so called in accordance with former nomenclature,are. preferably metal cylinders, as shown, so that the shaft passesthrough. the center of the lower one from end to end. This removes thepivotal point of the bulbs and their tube considered as an integralsystem to the lowest part of said system. and a much slighter degree ofheat will suffice to cause the tilting thereof than would otherwise benecessary. By varying the quality of the volatile liquid thesensitiveness to heat may be further increased or diminished, the devicebeing not merely a fire-indicator, but a thermostat of every degree.

One end of the lower bulb B is provided with a plate I), having on it astud 1), against which bears a spring E, having a catch E formedthereon. This suffices to hold the upper bulb A in its normal positionso long as said bulb is empty; but a slight increase of weight in saidbulb will cause it to overcome the resistance of said spring and catchand descend. The tube C has a lateral finger F rigid therewith. Uponthis rests one arm of a bent lever G, which is essentially a bell-cranklever, although the said arm is much longer than the other arm, which isnormally upright. This upright arm (marked 9 of said lever,) is jointedat its upper end to a slide G", working through a slot in the side wallof the inclosing-casing H and also through a slot 2' in a face-plate I,attached to the exterior of said side wall. The protruding end of thisslide enters the bifurcated end J 2 of a normally-horizontal catch J.This catch is pivoted nearits other end on said face-plate and has arearwardlyextending stud j, which is normally in close proximity to alaterally extending lip I of said plate. A hook K on the pull-cord L ofan alarm mechanism is caught under this stud j and held by lip I againstslipping off the same. WVhen the up per bulb A drops, the long arm oflever G falls with it, and the upright arm g of said lever is tiltedback, so as to withdraw the slide G and release the bifurcated end J 2of catch J. This end J 2 then falls, and in consequence the stud 7'rises and releases the hook K, so that the alarm is free to sound. Anysuitable alarm held in check by said cord maybe used; but we prefer aclock-work alarm, such as shown in Patent No. 348,675 and in our patentapplication, Serial No. 334,572, now pending. In this the cord L passesaround a pulley M, which turns with the Winding-arbor M of themainspringN of a clock-work train 0, operating in the usual manner ahammer P, which acts on a gong Q. hen the cord L is drawn down, thespring is wound. When the cord is released, the spring operates theclock-work and the alarm.

No further description is necessary, the mechanism being fully set forthin the patent above mentioned.

To enable an electric alarm to be operated by these bulbs andattachments, we attach two binding-posts R and S to the side wall of thecasing H. One of these R is in contact with the plate or bracket T,attached to the inner face of said side wall and extending inwardlytherefrom, to which plate or bracket the lever G is pivoted. The otherbinding-post S is connected by a wire U to a bent stop-bar V, on whichthe long end of lever G falls when the upper bulb A reaches its lowerposition. From the said binding-posts the circuit-wires W WV extend toany burglar-alarm, (inclicated at X,) 1 being the battery, y themagnet,1 the armature, and y the bell.

Z designates an arm extending laterally from the tube 0 above the lowerbulb B, and z designates a screw arranged to turn through the side wallof said casing and come in contact with the end of said arm. Accordingas said screw is turned in more or less far the bulb A will be allowedto tilt more or less into an upright position, thus regulating theleverage of the upper bulb and consequently the sensitiveness of thedevice. The spring E, by its catch E, holds the said bulbs and theirconnecting-tube, as stated, whatever the adjustment. Instead of spring Ewe may employ (see Fig. 4) a weight E on the end of an arm E bent backof the center of the lower bulb. The casing H of course incloses andsupports the pivot-shaft D and the other operative parts of theheat-indicator support. As there is no especial novelty in itsconstruction,there is no need to describe itmore fully.

The dotted lines in Fig. 4 show the position of the bulbs, the tube, thearm E attached thereto, and the weight E on' said arm when the alarm isoperated.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. A heat-indicator consisting of two bulbs and their connecting-tubeinclosing volatile liquid in vacuo, the said bulbs and tube beingpivoted on a line passing through the lower bulb, substantially as setforth.

2. A heat-indicator consisting of two bulbs and a connecting tubecontaining volatile liquid in vacuo, the whole being pivoted as anintegral device, in combination with an adjusting-screw for regulatingthe position of the same, and consequently regulating the leverage ofthe upper bulb, substantially as set forth.

3. A heat-indicator consisting of two bulbs and a connecting-tubecontaining volatile liquid, the whole being pivoted as an integraldevice, in combination with a spring which is arranged to hold the upperbulb against dcscending while empty, substantially as set forth.

4. A heat-indicator consisting of two bulbs and a connecting-tubecontaining volatile liquid in vacuo, the whole being pivoted as anintegral device on an axis passiugthrough the lower bulb, and the saidlower bulb being provided with a projecting stud, in combination with aspring having a catch to engage with said stud, substantially assetforth.

5. Aheat-indicator consisting of two bulbs and a connecting-tubecontaining volatile liquid in vacuo, the whole being pivoted as anintegral device on an axis passing through the lower bulb, incombination with an alarm and necessary connections, for the purpose setforth.

6. A heat-indicator consisting of two bulbs and a connectingtubecontaining volatile liquid in vacuo, the whole being pivoted as anintegral device, in combination with a levcr supported by the upper partof said heatindicator and descending therewith, a. slide attached tosaid lever, a catch supported by said slide, and the pull-cord of analarm set free by the withdrawal of said slide from said catch,substantially as set forth.

7. A pivoted heat-indicator consisting of two bulbs and aconnecting-tube containing volatile liquid, in combination with anadjusting-screw, said tube being provided with a laterally-extendin garm Z, arranged to co me in contact with said screw, substantially asset forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

ANTHONY ISKE. ALBERT ISKE. Witnesses:

JAs. B. DONNELLY, O. O. DONNELLY.

